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- Committer: Teddy Hogeborn
- Date: 2011-10-10 20:30:55 UTC
- mfrom: (237.11.13 teddy)
- mto: (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 288.
- Revision ID: teddy@recompile.se-20111010203055-a4crqy7gw2ln252r
Miscellaneous fixes prompted by lintian:
* debian/control (Conflicts): Changed to "Breaks:".
* debian/copyright: Updated format.
* debian/mandos-client.postinst: Use "set -e" instead of "#!/bin/sh -e".
* debian/mandos-client.postrm: - '' -
* debian/mandos.postinst: - '' -
* debian/mandos.prerm: Consistent magic.
* mandos: Small comment change.
* mandos-clients.conf.xml (OPTIONS/extended_timeout): Fix spelling.
* debian/control (Conflicts): Changed to "Breaks:".
* debian/copyright: Updated format.
* debian/mandos-client.postinst: Use "set -e" instead of "#!/bin/sh -e".
* debian/mandos-client.postrm: - '' -
* debian/mandos.postinst: - '' -
* debian/mandos.prerm: Consistent magic.
* mandos: Small comment change.
* mandos-clients.conf.xml (OPTIONS/extended_timeout): Fix spelling.
- files added:
- DBUS-API
- debian/source
- files removed:
- debian/mandos-client.config
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
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13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn
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# Copyright © 2008 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
16
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
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# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
import SocketServer
37
import SocketServer as socketserver
37
38
import socket
38
from optparse import OptionParser
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
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import signal
52
from sets import Set
53
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import subprocess
54
54
import atexit
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import stat
56
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import logging
57
57
import logging.handlers
58
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import pwd
59
from contextlib import closing
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
60
66
61
67
import dbus
62
68
import dbus.service
65
71
from dbus.mainloop.glib import DBusGMainLoop
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72
import ctypes
67
73
import ctypes.util
68
69
version = "1.0.2"
70
74
import xml.dom.minidom
75
import inspect
76
77
try:
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
except AttributeError:
80
try:
81
from IN import SO_BINDTODEVICE
82
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.0"
87
88
#logger = logging.getLogger('mandos')
71
89
logger = logging.Logger('mandos')
72
90
syslogger = (logging.handlers.SysLogHandler
73
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
92
address = str("/dev/log")))
75
93
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
77
96
logger.addHandler(syslogger)
78
97
79
98
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
81
101
' %(message)s'))
82
102
logger.addHandler(console)
83
103
84
104
class AvahiError(Exception):
85
def __init__(self, value):
105
def __init__(self, value, *args, **kwargs):
86
106
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
90
110
91
111
class AvahiServiceError(AvahiError):
92
112
pass
97
117
98
118
class AvahiService(object):
99
119
"""An Avahi (Zeroconf) service.
120
100
121
Attributes:
101
122
interface: integer; avahi.IF_UNSPEC or an interface index.
102
123
Used to optionally bind to the specified interface.
110
131
max_renames: integer; maximum number of renames
111
132
rename_count: integer; counter so we only rename after collisions
112
133
a sensible number of times
134
group: D-Bus Entry Group
135
server: D-Bus Server
136
bus: dbus.SystemBus()
113
137
"""
114
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
139
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
117
142
self.interface = interface
118
143
self.name = name
119
144
self.type = servicetype
123
148
self.host = host
124
149
self.rename_count = 0
125
150
self.max_renames = max_renames
151
self.protocol = protocol
152
self.group = None # our entry group
153
self.server = None
154
self.bus = bus
155
self.entry_group_state_changed_match = None
126
156
def rename(self):
127
157
"""Derived from the Avahi example code"""
128
158
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
159
logger.critical("No suitable Zeroconf service name found"
160
" after %i retries, exiting.",
131
161
self.rename_count)
132
162
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
165
logger.info("Changing Zeroconf service name to %r ...",
166
self.name)
136
167
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
139
171
self.remove()
140
self.add()
172
try:
173
self.add()
174
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
141
178
self.rename_count += 1
142
179
def remove(self):
143
180
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
181
if self.entry_group_state_changed_match is not None:
182
self.entry_group_state_changed_match.remove()
183
self.entry_group_state_changed_match = None
184
if self.group is not None:
185
self.group.Reset()
146
186
def add(self):
147
187
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
188
self.remove()
189
if self.group is None:
190
self.group = dbus.Interface(
191
self.bus.get_object(avahi.DBUS_NAME,
192
self.server.EntryGroupNew()),
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
self.entry_group_state_changed_match = (
195
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
self.name, self.type)
199
self.group.AddService(
200
self.interface,
201
self.protocol,
202
dbus.UInt32(0), # flags
203
self.name, self.type,
204
self.domain, self.host,
205
dbus.UInt16(self.port),
206
avahi.string_array_to_txt_array(self.TXT))
207
self.group.Commit()
208
def entry_group_state_changed(self, state, error):
209
"""Derived from the Avahi example code"""
210
logger.debug("Avahi entry group state change: %i", state)
211
212
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
logger.debug("Zeroconf service established.")
214
elif state == avahi.ENTRY_GROUP_COLLISION:
215
logger.info("Zeroconf service name collision.")
216
self.rename()
217
elif state == avahi.ENTRY_GROUP_FAILURE:
218
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
222
def cleanup(self):
223
"""Derived from the Avahi example code"""
224
if self.group is not None:
225
try:
226
self.group.Free()
227
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
229
pass
230
self.group = None
231
self.remove()
232
def server_state_changed(self, state, error=None):
233
"""Derived from the Avahi example code"""
234
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
242
if state in bad_states:
243
if bad_states[state] is not None:
244
if error is None:
245
logger.error(bad_states[state])
246
else:
247
logger.error(bad_states[state] + ": %r", error)
248
self.cleanup()
249
elif state == avahi.SERVER_RUNNING:
250
self.add()
251
else:
252
if error is None:
253
logger.debug("Unknown state: %r", state)
254
else:
255
logger.debug("Unknown state: %r: %r", state, error)
256
def activate(self):
257
"""Derived from the Avahi example code"""
258
if self.server is None:
259
self.server = dbus.Interface(
260
self.bus.get_object(avahi.DBUS_NAME,
261
avahi.DBUS_PATH_SERVER,
262
follow_name_owner_changes=True),
263
avahi.DBUS_INTERFACE_SERVER)
264
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
266
self.server_state_changed(self.server.GetState())
267
268
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
class Client(object):
179
276
"""A representation of a client host served by this server.
277
180
278
Attributes:
181
name: string; from the config file, used in log messages
279
_approved: bool(); 'None' if not yet approved/disapproved
280
approval_delay: datetime.timedelta(); Time to wait for approval
281
approval_duration: datetime.timedelta(); Duration of one approval
282
checker: subprocess.Popen(); a running checker process used
283
to see if the client lives.
284
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
286
checker_command: string; External command which is run to check
287
if client lives. %() expansions are done at
288
runtime with vars(self) as dict, so that for
289
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
291
created: datetime.datetime(); (UTC) object creation
292
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
295
enabled: bool()
182
296
fingerprint: string (40 or 32 hexadecimal digits); used to
183
297
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
298
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
299
interval: datetime.timedelta(); How often to start a new checker
300
last_approval_request: datetime.datetime(); (UTC) or None
301
last_checked_ok: datetime.datetime(); (UTC) or None
187
302
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
189
last_checked_ok: datetime.datetime(); (UTC) or None
303
name: string; from the config file, used in log messages and
304
D-Bus identifiers
305
secret: bytestring; sent verbatim (over TLS) to client
190
306
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
194
checker: subprocess.Popen(); a running checker process used
195
to see if the client lives.
196
'None' if no process is running.
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
202
runtime with vars(self) as dict, so that for
203
instance %(name)s can be used in the command.
204
dbus_object_path: dbus.ObjectPath
205
Private attibutes:
206
_timeout: Real variable for 'timeout'
207
_interval: Real variable for 'interval'
208
_timeout_milliseconds: Used when calling gobject.timeout_add()
209
_interval_milliseconds: - '' -
307
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
309
runtime_expansions: Allowed attributes for runtime expansion.
310
expires: datetime.datetime(); time (UTC) when a client will be
311
disabled, or None
210
312
"""
211
def _set_timeout(self, timeout):
212
"Setter function for the 'timeout' attribute"
213
self._timeout = timeout
214
self._timeout_milliseconds = ((self.timeout.days
215
* 24 * 60 * 60 * 1000)
216
+ (self.timeout.seconds * 1000)
217
+ (self.timeout.microseconds
218
// 1000))
219
# Emit D-Bus signal
220
self.PropertyChanged(dbus.String(u"timeout"),
221
(dbus.UInt64(self._timeout_milliseconds,
222
variant_level=1)))
223
timeout = property(lambda self: self._timeout, _set_timeout)
224
del _set_timeout
225
226
def _set_interval(self, interval):
227
"Setter function for the 'interval' attribute"
228
self._interval = interval
229
self._interval_milliseconds = ((self.interval.days
230
* 24 * 60 * 60 * 1000)
231
+ (self.interval.seconds
232
* 1000)
233
+ (self.interval.microseconds
234
// 1000))
235
# Emit D-Bus signal
236
self.PropertyChanged(dbus.String(u"interval"),
237
(dbus.UInt64(self._interval_milliseconds,
238
variant_level=1)))
239
interval = property(lambda self: self._interval, _set_interval)
240
del _set_interval
313
314
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
317
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
241
333
242
334
def __init__(self, name = None, disable_hook=None, config=None):
243
335
"""Note: the 'checker' key in 'config' sets the
244
336
'checker_command' attribute and *not* the 'checker'
245
337
attribute."""
246
self.dbus_object_path = (dbus.ObjectPath
247
("/Mandos/clients/"
248
+ name.replace(".", "_")))
249
dbus.service.Object.__init__(self, bus,
250
self.dbus_object_path)
338
self.name = name
251
339
if config is None:
252
340
config = {}
253
self.name = name
254
logger.debug(u"Creating client %r", self.name)
341
logger.debug("Creating client %r", self.name)
255
342
# Uppercase and remove spaces from fingerprint for later
256
343
# comparison purposes with return value from the fingerprint()
257
344
# function
258
345
self.fingerprint = (config["fingerprint"].upper()
259
.replace(u" ", u""))
260
logger.debug(u" Fingerprint: %s", self.fingerprint)
346
.replace(" ", ""))
347
logger.debug(" Fingerprint: %s", self.fingerprint)
261
348
if "secret" in config:
262
self.secret = config["secret"].decode(u"base64")
349
self.secret = config["secret"].decode("base64")
263
350
elif "secfile" in config:
264
with closing(open(os.path.expanduser
265
(os.path.expandvars
266
(config["secfile"])))) as secfile:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
267
354
self.secret = secfile.read()
268
355
else:
269
raise TypeError(u"No secret or secfile for client %s"
356
raise TypeError("No secret or secfile for client %s"
270
357
% self.name)
271
358
self.host = config.get("host", "")
272
359
self.created = datetime.datetime.utcnow()
273
360
self.enabled = False
361
self.last_approval_request = None
274
362
self.last_enabled = None
275
363
self.last_checked_ok = None
276
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
277
367
self.interval = string_to_delta(config["interval"])
278
368
self.disable_hook = disable_hook
279
369
self.checker = None
280
370
self.checker_initiator_tag = None
281
371
self.disable_initiator_tag = None
372
self.expires = None
282
373
self.checker_callback_tag = None
283
374
self.checker_command = config["checker"]
375
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
380
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
389
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
284
393
285
394
def enable(self):
286
395
"""Start this client's checker and timeout hooks"""
287
self.last_enabled = datetime.datetime.utcnow()
396
if getattr(self, "enabled", False):
397
# Already enabled
398
return
399
self.send_changedstate()
288
400
# Schedule a new checker to be started an 'interval' from now,
289
401
# and every interval from then on.
290
402
self.checker_initiator_tag = (gobject.timeout_add
291
(self._interval_milliseconds,
403
(self.interval_milliseconds(),
292
404
self.start_checker))
293
# Also start a new checker *right now*.
294
self.start_checker()
295
405
# Schedule a disable() when 'timeout' has passed
406
self.expires = datetime.datetime.utcnow() + self.timeout
296
407
self.disable_initiator_tag = (gobject.timeout_add
297
(self._timeout_milliseconds,
408
(self.timeout_milliseconds(),
298
409
self.disable))
299
410
self.enabled = True
300
# Emit D-Bus signal
301
self.PropertyChanged(dbus.String(u"enabled"),
302
dbus.Boolean(True, variant_level=1))
303
self.PropertyChanged(dbus.String(u"last_enabled"),
304
(_datetime_to_dbus(self.last_enabled,
305
variant_level=1)))
411
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
306
414
307
def disable(self):
415
def disable(self, quiet=True):
308
416
"""Disable this client."""
309
417
if not getattr(self, "enabled", False):
310
418
return False
311
logger.info(u"Disabling client %s", self.name)
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
logger.info("Disabling client %s", self.name)
312
423
if getattr(self, "disable_initiator_tag", False):
313
424
gobject.source_remove(self.disable_initiator_tag)
314
425
self.disable_initiator_tag = None
426
self.expires = None
315
427
if getattr(self, "checker_initiator_tag", False):
316
428
gobject.source_remove(self.checker_initiator_tag)
317
429
self.checker_initiator_tag = None
319
431
if self.disable_hook:
320
432
self.disable_hook(self)
321
433
self.enabled = False
322
# Emit D-Bus signal
323
self.PropertyChanged(dbus.String(u"enabled"),
324
dbus.Boolean(False, variant_level=1))
325
434
# Do not run this again if called by a gobject.timeout_add
326
435
return False
327
436
333
442
"""The checker has completed, so take appropriate actions."""
334
443
self.checker_callback_tag = None
335
444
self.checker = None
336
# Emit D-Bus signal
337
self.PropertyChanged(dbus.String(u"checker_running"),
338
dbus.Boolean(False, variant_level=1))
339
if (os.WIFEXITED(condition)
340
and (os.WEXITSTATUS(condition) == 0)):
341
logger.info(u"Checker for %(name)s succeeded",
342
vars(self))
343
# Emit D-Bus signal
344
self.CheckerCompleted(dbus.Boolean(True),
345
dbus.UInt16(condition),
346
dbus.String(command))
347
self.bump_timeout()
348
elif not os.WIFEXITED(condition):
349
logger.warning(u"Checker for %(name)s crashed?",
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
448
logger.info("Checker for %(name)s succeeded",
449
vars(self))
450
self.checked_ok()
451
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
454
else:
455
logger.warning("Checker for %(name)s crashed?",
350
456
vars(self))
351
# Emit D-Bus signal
352
self.CheckerCompleted(dbus.Boolean(False),
353
dbus.UInt16(condition),
354
dbus.String(command))
355
else:
356
logger.info(u"Checker for %(name)s failed",
357
vars(self))
358
# Emit D-Bus signal
359
self.CheckerCompleted(dbus.Boolean(False),
360
dbus.UInt16(condition),
361
dbus.String(command))
362
457
363
def bump_timeout(self):
458
def checked_ok(self, timeout=None):
364
459
"""Bump up the timeout for this client.
460
365
461
This should only be called when the client has been seen,
366
462
alive and well.
367
463
"""
464
if timeout is None:
465
timeout = self.timeout
368
466
self.last_checked_ok = datetime.datetime.utcnow()
369
467
gobject.source_remove(self.disable_initiator_tag)
370
468
self.disable_initiator_tag = (gobject.timeout_add
371
(self._timeout_milliseconds,
372
self.disable))
373
self.PropertyChanged(dbus.String(u"last_checked_ok"),
374
(_datetime_to_dbus(self.last_checked_ok,
375
variant_level=1)))
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
472
473
def need_approval(self):
474
self.last_approval_request = datetime.datetime.utcnow()
376
475
377
476
def start_checker(self):
378
477
"""Start a new checker subprocess if one is not running.
478
379
479
If a checker already exists, leave it running and do
380
480
nothing."""
381
481
# The reason for not killing a running checker is that if we
384
484
# client would inevitably timeout, since no checker would get
385
485
# a chance to run to completion. If we instead leave running
386
486
# checkers alone, the checker would have to take more time
387
# than 'timeout' for the client to be declared invalid, which
388
# is as it should be.
487
# than 'timeout' for the client to be disabled, which is as it
488
# should be.
489
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
503
# Start a new checker if needed
389
504
if self.checker is None:
390
505
try:
391
506
# In case checker_command has exactly one % operator
392
507
command = self.checker_command % self.host
393
508
except TypeError:
394
509
# Escape attributes for the shell
395
escaped_attrs = dict((key, re.escape(str(val)))
396
for key, val in
397
vars(self).iteritems())
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
398
518
try:
399
519
command = self.checker_command % escaped_attrs
400
except TypeError, error:
401
logger.error(u'Could not format string "%s":'
402
u' %s', self.checker_command, error)
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
403
523
return True # Try again later
524
self.current_checker_command = command
404
525
try:
405
logger.info(u"Starting checker %r for %s",
526
logger.info("Starting checker %r for %s",
406
527
command, self.name)
407
528
# We don't need to redirect stdout and stderr, since
408
529
# in normal mode, that is already done by daemon(),
411
532
self.checker = subprocess.Popen(command,
412
533
close_fds=True,
413
534
shell=True, cwd="/")
414
# Emit D-Bus signal
415
self.CheckerStarted(command)
416
self.PropertyChanged(dbus.String("checker_running"),
417
dbus.Boolean(True, variant_level=1))
418
535
self.checker_callback_tag = (gobject.child_watch_add
419
536
(self.checker.pid,
420
537
self.checker_callback,
421
538
data=command))
422
except OSError, error:
423
logger.error(u"Failed to start subprocess: %s",
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
424
547
error)
425
548
# Re-run this periodically if run by gobject.timeout_add
426
549
return True
432
555
self.checker_callback_tag = None
433
556
if getattr(self, "checker", None) is None:
434
557
return
435
logger.debug(u"Stopping checker for %(name)s", vars(self))
558
logger.debug("Stopping checker for %(name)s", vars(self))
436
559
try:
437
560
os.kill(self.checker.pid, signal.SIGTERM)
438
#os.sleep(0.5)
561
#time.sleep(0.5)
439
562
#if self.checker.poll() is None:
440
563
# os.kill(self.checker.pid, signal.SIGKILL)
441
except OSError, error:
564
except OSError as error:
442
565
if error.errno != errno.ESRCH: # No such process
443
566
raise
444
567
self.checker = None
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
449
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
454
return now < (self.created + self.timeout)
455
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"org.mandos_system.Mandos.Client"
460
461
# BumpTimeout - method
462
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
463
BumpTimeout.__name__ = "BumpTimeout"
568
569
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
572
"""Decorators for marking methods of a DBusObjectWithProperties to
573
become properties on the D-Bus.
574
575
The decorated method will be called with no arguments by "Get"
576
and with one argument by "Set".
577
578
The parameters, where they are supported, are the same as
579
dbus.service.method, except there is only "signature", since the
580
type from Get() and the type sent to Set() is the same.
581
"""
582
# Encoding deeply encoded byte arrays is not supported yet by the
583
# "Set" method, so we fail early here:
584
if byte_arrays and signature != "ay":
585
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
587
def decorator(func):
588
func._dbus_is_property = True
589
func._dbus_interface = dbus_interface
590
func._dbus_signature = signature
591
func._dbus_access = access
592
func._dbus_name = func.__name__
593
if func._dbus_name.endswith("_dbus_property"):
594
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
597
return decorator
598
599
600
class DBusPropertyException(dbus.exceptions.DBusException):
601
"""A base class for D-Bus property-related exceptions
602
"""
603
def __unicode__(self):
604
return unicode(str(self))
605
606
607
class DBusPropertyAccessException(DBusPropertyException):
608
"""A property's access permissions disallows an operation.
609
"""
610
pass
611
612
613
class DBusPropertyNotFound(DBusPropertyException):
614
"""An attempt was made to access a non-existing property.
615
"""
616
pass
617
618
619
class DBusObjectWithProperties(dbus.service.Object):
620
"""A D-Bus object with properties.
621
622
Classes inheriting from this can use the dbus_service_property
623
decorator to expose methods as D-Bus properties. It exposes the
624
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
"""
626
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
639
def _get_dbus_property(self, interface_name, property_name):
640
"""Returns a bound method if one exists which is a D-Bus
641
property with the specified name and interface.
642
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
646
if (value._dbus_name == property_name
647
and value._dbus_interface == interface_name):
648
return value.__get__(self)
649
650
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
656
out_signature="v")
657
def Get(self, interface_name, property_name):
658
"""Standard D-Bus property Get() method, see D-Bus standard.
659
"""
660
prop = self._get_dbus_property(interface_name, property_name)
661
if prop._dbus_access == "write":
662
raise DBusPropertyAccessException(property_name)
663
value = prop()
664
if not hasattr(value, "variant_level"):
665
return value
666
return type(value)(value, variant_level=value.variant_level+1)
667
668
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
def Set(self, interface_name, property_name, value):
670
"""Standard D-Bus property Set() method, see D-Bus standard.
671
"""
672
prop = self._get_dbus_property(interface_name, property_name)
673
if prop._dbus_access == "read":
674
raise DBusPropertyAccessException(property_name)
675
if prop._dbus_get_args_options["byte_arrays"]:
676
# The byte_arrays option is not supported yet on
677
# signatures other than "ay".
678
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
682
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
685
out_signature="a{sv}")
686
def GetAll(self, interface_name):
687
"""Standard D-Bus property GetAll() method, see D-Bus
688
standard.
689
690
Note: Will not include properties with access="write".
691
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
694
if (interface_name
695
and interface_name != prop._dbus_interface):
696
# Interface non-empty but did not match
697
continue
698
# Ignore write-only properties
699
if prop._dbus_access == "write":
700
continue
701
value = prop()
702
if not hasattr(value, "variant_level"):
703
all[name] = value
704
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
709
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
out_signature="s",
711
path_keyword='object_path',
712
connection_keyword='connection')
713
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
715
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
718
try:
719
document = xml.dom.minidom.parseString(xmlstring)
720
def make_tag(document, name, prop):
721
e = document.createElement("property")
722
e.setAttribute("name", name)
723
e.setAttribute("type", prop._dbus_signature)
724
e.setAttribute("access", prop._dbus_access)
725
return e
726
for if_tag in document.getElementsByTagName("interface"):
727
for tag in (make_tag(document, name, prop)
728
for name, prop
729
in self._get_all_dbus_properties()
730
if prop._dbus_interface
731
== if_tag.getAttribute("name")):
732
if_tag.appendChild(tag)
733
# Add the names to the return values for the
734
# "org.freedesktop.DBus.Properties" methods
735
if (if_tag.getAttribute("name")
736
== "org.freedesktop.DBus.Properties"):
737
for cn in if_tag.getElementsByTagName("method"):
738
if cn.getAttribute("name") == "Get":
739
for arg in cn.getElementsByTagName("arg"):
740
if (arg.getAttribute("direction")
741
== "out"):
742
arg.setAttribute("name", "value")
743
elif cn.getAttribute("name") == "GetAll":
744
for arg in cn.getElementsByTagName("arg"):
745
if (arg.getAttribute("direction")
746
== "out"):
747
arg.setAttribute("name", "props")
748
xmlstring = document.toxml("utf-8")
749
document.unlink()
750
except (AttributeError, xml.dom.DOMException,
751
xml.parsers.expat.ExpatError) as error:
752
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
if dt is None:
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
768
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
776
# Ignore non-D-Bus attributes, and D-Bus attributes
777
# with the wrong interface name
778
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
781
continue
782
# Create an alternate D-Bus interface name based on
783
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
787
# Is this a D-Bus signal?
788
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
792
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
795
# Create a new, but exactly alike, function
796
# object, and decorate it to be a new D-Bus signal
797
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
807
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
810
def fixscope(func1, func2):
811
"""This function is a scope container to pass
812
func1 and func2 to the "call_both" function
813
outside of its arguments"""
814
def call_both(*args, **kwargs):
815
"""This function will emit two D-Bus
816
signals by calling func1 and func2"""
817
func1(*args, **kwargs)
818
func2(*args, **kwargs)
819
return call_both
820
# Create the "call_both" function and add it to
821
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
824
# Is this a D-Bus method?
825
elif getattr(attribute, "_dbus_is_method", False):
826
# Create a new, but exactly alike, function
827
# object. Decorate it to be a new D-Bus method
828
# with the alternate D-Bus interface name. Add it
829
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
attribute.func_closure)))
840
# Is this a D-Bus property?
841
elif getattr(attribute, "_dbus_is_property", False):
842
# Create a new, but exactly alike, function
843
# object, and decorate it to be a new D-Bus
844
# property with the alternate D-Bus interface
845
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
861
class ClientDBus(Client, DBusObjectWithProperties):
862
"""A Client class using D-Bus
863
864
Attributes:
865
dbus_object_path: dbus.ObjectPath
866
bus: dbus.SystemBus()
867
"""
868
869
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
872
# dbus.service.Object doesn't use super(), so we can't either.
873
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
876
self.bus = bus
877
Client.__init__(self, *args, **kwargs)
878
# Only now, when this client is initialized, can it show up on
879
# the D-Bus
880
client_object_name = unicode(self.name).translate(
881
{ord("."): ord("_"),
882
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
885
DBusObjectWithProperties.__init__(self, self.bus,
886
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
891
""" Modify a variable so that it's a property which announces
892
its changes to DBus.
893
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
896
dbus_name: D-Bus name of the variable
897
type_func: Function that transform the value before sending it
898
to the D-Bus. Default: no transform
899
variant_level: D-Bus variant level. Default: 1
900
"""
901
attrname = "_{0}".format(dbus_name)
902
def setter(self, value):
903
if hasattr(self, "dbus_object_path"):
904
if (not hasattr(self, attrname) or
905
type_func(getattr(self, attrname, None))
906
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
911
setattr(self, attrname, value)
912
913
return property(lambda self: getattr(self, attrname), setter)
914
915
916
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
approvals_pending = notifychangeproperty(dbus.Boolean,
918
"ApprovalPending",
919
type_func = bool)
920
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
last_enabled = notifychangeproperty(datetime_to_dbus,
922
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
926
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
"LastCheckedOK")
928
last_approval_request = notifychangeproperty(
929
datetime_to_dbus, "LastApprovalRequest")
930
approved_by_default = notifychangeproperty(dbus.Boolean,
931
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
936
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
939
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
943
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
950
checker_command = notifychangeproperty(dbus.String, "Checker")
951
952
del notifychangeproperty
953
954
def __del__(self, *args, **kwargs):
955
try:
956
self.remove_from_connection()
957
except LookupError:
958
pass
959
if hasattr(DBusObjectWithProperties, "__del__"):
960
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
Client.__del__(self, *args, **kwargs)
962
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
exitstatus = os.WEXITSTATUS(condition)
969
# Emit D-Bus signal
970
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
972
dbus.String(command))
973
else:
974
# Emit D-Bus signal
975
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
977
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
982
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
988
r = Client.start_checker(self, *args, **kwargs)
989
# Only if new checker process was started
990
if (self.checker is not None
991
and old_checker_pid != self.checker.pid):
992
# Emit D-Bus signal
993
self.CheckerStarted(self.current_checker_command)
994
return r
995
996
def _reset_approved(self):
997
self._approved = None
998
return False
999
1000
def approve(self, value=True):
1001
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1008
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1010
1011
## Signals
464
1012
465
1013
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="bqs")
467
def CheckerCompleted(self, success, condition, command):
1014
@dbus.service.signal(_interface, signature="nxs")
1015
def CheckerCompleted(self, exitcode, waitstatus, command):
468
1016
"D-Bus signal"
469
1017
pass
470
1018
474
1022
"D-Bus signal"
475
1023
pass
476
1024
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self._timeout_milliseconds,
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self._interval_milliseconds,
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
}, signature="sv")
515
516
# IsStillValid - method
517
IsStillValid = (dbus.service.method(_interface, out_signature="b")
518
(still_valid))
519
IsStillValid.__name__ = "IsStillValid"
520
521
1025
# PropertyChanged - signal
522
1026
@dbus.service.signal(_interface, signature="sv")
523
1027
def PropertyChanged(self, property, value):
524
1028
"D-Bus signal"
525
1029
pass
526
1030
527
# SetChecker - method
528
@dbus.service.method(_interface, in_signature="s")
529
def SetChecker(self, checker):
530
"D-Bus setter method"
531
self.checker_command = checker
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
539
# SetInterval - method
540
@dbus.service.method(_interface, in_signature="t")
541
def SetInterval(self, milliseconds):
542
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
543
544
# SetSecret - method
545
@dbus.service.method(_interface, in_signature="ay",
546
byte_arrays=True)
547
def SetSecret(self, secret):
548
"D-Bus setter method"
549
self.secret = str(secret)
550
551
# SetTimeout - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetTimeout(self, milliseconds):
554
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
1031
# GotSecret - signal
1032
@dbus.service.signal(_interface)
1033
def GotSecret(self):
1034
"""D-Bus signal
1035
Is sent after a successful transfer of secret from the Mandos
1036
server to mandos-client
1037
"""
1038
pass
1039
1040
# Rejected - signal
1041
@dbus.service.signal(_interface, signature="s")
1042
def Rejected(self, reason):
1043
"D-Bus signal"
1044
pass
1045
1046
# NeedApproval - signal
1047
@dbus.service.signal(_interface, signature="tb")
1048
def NeedApproval(self, timeout, default):
1049
"D-Bus signal"
1050
return self.need_approval()
1051
1052
## Methods
1053
1054
# Approve - method
1055
@dbus.service.method(_interface, in_signature="b")
1056
def Approve(self, value):
1057
self.approve(value)
1058
1059
# CheckedOK - method
1060
@dbus.service.method(_interface)
1061
def CheckedOK(self):
1062
self.checked_ok()
555
1063
556
1064
# Enable - method
557
Enable = dbus.service.method(_interface)(enable)
558
Enable.__name__ = "Enable"
1065
@dbus.service.method(_interface)
1066
def Enable(self):
1067
"D-Bus method"
1068
self.enable()
559
1069
560
1070
# StartChecker - method
561
1071
@dbus.service.method(_interface)
570
1080
self.disable()
571
1081
572
1082
# StopChecker - method
573
StopChecker = dbus.service.method(_interface)(stop_checker)
574
StopChecker.__name__ = "StopChecker"
1083
@dbus.service.method(_interface)
1084
def StopChecker(self):
1085
self.stop_checker()
1086
1087
## Properties
1088
1089
# ApprovalPending - property
1090
@dbus_service_property(_interface, signature="b", access="read")
1091
def ApprovalPending_dbus_property(self):
1092
return dbus.Boolean(bool(self.approvals_pending))
1093
1094
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
1096
access="readwrite")
1097
def ApprovedByDefault_dbus_property(self, value=None):
1098
if value is None: # get
1099
return dbus.Boolean(self.approved_by_default)
1100
self.approved_by_default = bool(value)
1101
1102
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
1104
access="readwrite")
1105
def ApprovalDelay_dbus_property(self, value=None):
1106
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
1108
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
1110
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
1112
access="readwrite")
1113
def ApprovalDuration_dbus_property(self, value=None):
1114
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
1117
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
1119
# Name - property
1120
@dbus_service_property(_interface, signature="s", access="read")
1121
def Name_dbus_property(self):
1122
return dbus.String(self.name)
1123
1124
# Fingerprint - property
1125
@dbus_service_property(_interface, signature="s", access="read")
1126
def Fingerprint_dbus_property(self):
1127
return dbus.String(self.fingerprint)
1128
1129
# Host - property
1130
@dbus_service_property(_interface, signature="s",
1131
access="readwrite")
1132
def Host_dbus_property(self, value=None):
1133
if value is None: # get
1134
return dbus.String(self.host)
1135
self.host = value
1136
1137
# Created - property
1138
@dbus_service_property(_interface, signature="s", access="read")
1139
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
1142
# LastEnabled - property
1143
@dbus_service_property(_interface, signature="s", access="read")
1144
def LastEnabled_dbus_property(self):
1145
return datetime_to_dbus(self.last_enabled)
1146
1147
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
1149
access="readwrite")
1150
def Enabled_dbus_property(self, value=None):
1151
if value is None: # get
1152
return dbus.Boolean(self.enabled)
1153
if value:
1154
self.enable()
1155
else:
1156
self.disable()
1157
1158
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
1160
access="readwrite")
1161
def LastCheckedOK_dbus_property(self, value=None):
1162
if value is not None:
1163
self.checked_ok()
1164
return
1165
return datetime_to_dbus(self.last_checked_ok)
1166
1167
# Expires - property
1168
@dbus_service_property(_interface, signature="s", access="read")
1169
def Expires_dbus_property(self):
1170
return datetime_to_dbus(self.expires)
1171
1172
# LastApprovalRequest - property
1173
@dbus_service_property(_interface, signature="s", access="read")
1174
def LastApprovalRequest_dbus_property(self):
1175
return datetime_to_dbus(self.last_approval_request)
1176
1177
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
1179
access="readwrite")
1180
def Timeout_dbus_property(self, value=None):
1181
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
1183
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1205
1206
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
1208
access="readwrite")
1209
def ExtendedTimeout_dbus_property(self, value=None):
1210
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
1212
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
1214
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
1216
access="readwrite")
1217
def Interval_dbus_property(self, value=None):
1218
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
1220
self.interval = datetime.timedelta(0, 0, 0, value)
1221
if getattr(self, "checker_initiator_tag", None) is None:
1222
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1228
1229
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
1231
access="readwrite")
1232
def Checker_dbus_property(self, value=None):
1233
if value is None: # get
1234
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
1237
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
1239
access="readwrite")
1240
def CheckerRunning_dbus_property(self, value=None):
1241
if value is None: # get
1242
return dbus.Boolean(self.checker is not None)
1243
if value:
1244
self.start_checker()
1245
else:
1246
self.stop_checker()
1247
1248
# ObjectPath - property
1249
@dbus_service_property(_interface, signature="o", access="read")
1250
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
1253
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
1256
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
575
1258
576
1259
del _interface
577
1260
578
1261
579
def peer_certificate(session):
580
"Return the peer's OpenPGP certificate as a bytestring"
581
# If not an OpenPGP certificate...
582
if (gnutls.library.functions
583
.gnutls_certificate_type_get(session._c_object)
584
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
585
# ...do the normal thing
586
return session.peer_certificate
587
list_size = ctypes.c_uint()
588
cert_list = (gnutls.library.functions
589
.gnutls_certificate_get_peers
590
(session._c_object, ctypes.byref(list_size)))
591
if list_size.value == 0:
592
return None
593
cert = cert_list[0]
594
return ctypes.string_at(cert.data, cert.size)
595
596
597
def fingerprint(openpgp):
598
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
599
# New GnuTLS "datum" with the OpenPGP public key
600
datum = (gnutls.library.types
601
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
602
ctypes.POINTER
603
(ctypes.c_ubyte)),
604
ctypes.c_uint(len(openpgp))))
605
# New empty GnuTLS certificate
606
crt = gnutls.library.types.gnutls_openpgp_crt_t()
607
(gnutls.library.functions
608
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
609
# Import the OpenPGP public key into the certificate
610
(gnutls.library.functions
611
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
612
gnutls.library.constants
613
.GNUTLS_OPENPGP_FMT_RAW))
614
# Verify the self signature in the key
615
crtverify = ctypes.c_uint()
616
(gnutls.library.functions
617
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
618
if crtverify.value != 0:
619
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
620
raise gnutls.errors.CertificateSecurityError("Verify failed")
621
# New buffer for the fingerprint
622
buf = ctypes.create_string_buffer(20)
623
buf_len = ctypes.c_size_t()
624
# Get the fingerprint from the certificate into the buffer
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
627
ctypes.byref(buf_len)))
628
# Deinit the certificate
629
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
630
# Convert the buffer to a Python bytestring
631
fpr = ctypes.string_at(buf, buf_len.value)
632
# Convert the bytestring to hexadecimal notation
633
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
634
return hex_fpr
635
636
637
class TCP_handler(SocketServer.BaseRequestHandler, object):
638
"""A TCP request handler class.
639
Instantiated by IPv6_TCPServer for each request to handle it.
1262
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
1264
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
1266
if not self._pipe.recv():
1267
raise KeyError()
1268
1269
def __getattribute__(self, name):
1270
if(name == '_pipe'):
1271
return super(ProxyClient, self).__getattribute__(name)
1272
self._pipe.send(('getattr', name))
1273
data = self._pipe.recv()
1274
if data[0] == 'data':
1275
return data[1]
1276
if data[0] == 'function':
1277
def func(*args, **kwargs):
1278
self._pipe.send(('funcall', name, args, kwargs))
1279
return self._pipe.recv()[1]
1280
return func
1281
1282
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
1284
return super(ProxyClient, self).__setattr__(name, value)
1285
self._pipe.send(('setattr', name, value))
1286
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
1290
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
"""A class to handle client connections.
1292
1293
Instantiated once for each connection to handle it.
640
1294
Note: This will run in its own forked process."""
641
1295
642
1296
def handle(self):
643
logger.info(u"TCP connection from: %s",
644
unicode(self.client_address))
645
session = (gnutls.connection
646
.ClientSession(self.request,
647
gnutls.connection
648
.X509Credentials()))
649
650
line = self.request.makefile().readline()
651
logger.debug(u"Protocol version: %r", line)
652
try:
653
if int(line.strip().split()[0]) > 1:
654
raise RuntimeError
655
except (ValueError, IndexError, RuntimeError), error:
656
logger.error(u"Unknown protocol version: %s", error)
657
return
658
659
# Note: gnutls.connection.X509Credentials is really a generic
660
# GnuTLS certificate credentials object so long as no X.509
661
# keys are added to it. Therefore, we can use it here despite
662
# using OpenPGP certificates.
663
664
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
665
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
666
# "+DHE-DSS"))
667
# Use a fallback default, since this MUST be set.
668
priority = self.server.settings.get("priority", "NORMAL")
669
(gnutls.library.functions
670
.gnutls_priority_set_direct(session._c_object,
671
priority, None))
672
673
try:
674
session.handshake()
675
except gnutls.errors.GNUTLSError, error:
676
logger.warning(u"Handshake failed: %s", error)
677
# Do not run session.bye() here: the session is not
678
# established. Just abandon the request.
679
return
680
try:
681
fpr = fingerprint(peer_certificate(session))
682
except (TypeError, gnutls.errors.GNUTLSError), error:
683
logger.warning(u"Bad certificate: %s", error)
684
session.bye()
685
return
686
logger.debug(u"Fingerprint: %s", fpr)
687
for c in self.server.clients:
688
if c.fingerprint == fpr:
689
client = c
690
break
691
else:
692
logger.warning(u"Client not found for fingerprint: %s",
693
fpr)
694
session.bye()
695
return
696
# Have to check if client.still_valid(), since it is possible
697
# that the client timed out while establishing the GnuTLS
698
# session.
699
if not client.still_valid():
700
logger.warning(u"Client %(name)s is invalid",
701
vars(client))
702
session.bye()
703
return
704
## This won't work here, since we're in a fork.
705
# client.bump_timeout()
706
sent_size = 0
707
while sent_size < len(client.secret):
708
sent = session.send(client.secret[sent_size:])
709
logger.debug(u"Sent: %d, remaining: %d",
710
sent, len(client.secret)
711
- (sent_size + sent))
712
sent_size += sent
713
session.bye()
714
715
716
class IPv6_TCPServer(SocketServer.ForkingMixIn,
717
SocketServer.TCPServer, object):
718
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1297
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
1300
logger.debug("Pipe FD: %d",
1301
self.server.child_pipe.fileno())
1302
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1312
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
1316
# "+DHE-DSS"))
1317
# Use a fallback default, since this MUST be set.
1318
priority = self.server.gnutls_priority
1319
if priority is None:
1320
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
1325
# Start communication using the Mandos protocol
1326
# Get protocol number
1327
line = self.request.makefile().readline()
1328
logger.debug("Protocol version: %r", line)
1329
try:
1330
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
1332
except (ValueError, IndexError, RuntimeError) as error:
1333
logger.error("Unknown protocol version: %s", error)
1334
return
1335
1336
# Start GnuTLS connection
1337
try:
1338
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
1340
logger.warning("Handshake failed: %s", error)
1341
# Do not run session.bye() here: the session is not
1342
# established. Just abandon the request.
1343
return
1344
logger.debug("Handshake succeeded")
1345
1346
approval_required = False
1347
try:
1348
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
1353
logger.warning("Bad certificate: %s", error)
1354
return
1355
logger.debug("Fingerprint: %s", fpr)
1356
1357
try:
1358
client = ProxyClient(child_pipe, fpr,
1359
self.client_address)
1360
except KeyError:
1361
return
1362
1363
if client.approval_delay:
1364
delay = client.approval_delay
1365
client.approvals_pending += 1
1366
approval_required = True
1367
1368
while True:
1369
if not client.enabled:
1370
logger.info("Client %s is disabled",
1371
client.name)
1372
if self.server.use_dbus:
1373
# Emit D-Bus signal
1374
client.Rejected("Disabled")
1375
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
1379
break
1380
elif client._approved is None:
1381
logger.info("Client %s needs approval",
1382
client.name)
1383
if self.server.use_dbus:
1384
# Emit D-Bus signal
1385
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
1388
else:
1389
logger.warning("Client %s was not approved",
1390
client.name)
1391
if self.server.use_dbus:
1392
# Emit D-Bus signal
1393
client.Rejected("Denied")
1394
return
1395
1396
#wait until timeout or approved
1397
time = datetime.datetime.now()
1398
client.changedstate.acquire()
1399
(client.changedstate.wait
1400
(float(client._timedelta_to_milliseconds(delay)
1401
/ 1000)))
1402
client.changedstate.release()
1403
time2 = datetime.datetime.now()
1404
if (time2 - time) >= delay:
1405
if not client.approved_by_default:
1406
logger.warning("Client %s timed out while"
1407
" waiting for approval",
1408
client.name)
1409
if self.server.use_dbus:
1410
# Emit D-Bus signal
1411
client.Rejected("Approval timed out")
1412
return
1413
else:
1414
break
1415
else:
1416
delay -= time2 - time
1417
1418
sent_size = 0
1419
while sent_size < len(client.secret):
1420
try:
1421
sent = session.send(client.secret[sent_size:])
1422
except gnutls.errors.GNUTLSError as error:
1423
logger.warning("gnutls send failed")
1424
return
1425
logger.debug("Sent: %d, remaining: %d",
1426
sent, len(client.secret)
1427
- (sent_size + sent))
1428
sent_size += sent
1429
1430
logger.info("Sending secret to %s", client.name)
1431
# bump the timeout using extended_timeout
1432
client.checked_ok(client.extended_timeout)
1433
if self.server.use_dbus:
1434
# Emit D-Bus signal
1435
client.GotSecret()
1436
1437
finally:
1438
if approval_required:
1439
client.approvals_pending -= 1
1440
try:
1441
session.bye()
1442
except gnutls.errors.GNUTLSError as error:
1443
logger.warning("GnuTLS bye failed")
1444
1445
@staticmethod
1446
def peer_certificate(session):
1447
"Return the peer's OpenPGP certificate as a bytestring"
1448
# If not an OpenPGP certificate...
1449
if (gnutls.library.functions
1450
.gnutls_certificate_type_get(session._c_object)
1451
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1452
# ...do the normal thing
1453
return session.peer_certificate
1454
list_size = ctypes.c_uint(1)
1455
cert_list = (gnutls.library.functions
1456
.gnutls_certificate_get_peers
1457
(session._c_object, ctypes.byref(list_size)))
1458
if not bool(cert_list) and list_size.value != 0:
1459
raise gnutls.errors.GNUTLSError("error getting peer"
1460
" certificate")
1461
if list_size.value == 0:
1462
return None
1463
cert = cert_list[0]
1464
return ctypes.string_at(cert.data, cert.size)
1465
1466
@staticmethod
1467
def fingerprint(openpgp):
1468
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1469
# New GnuTLS "datum" with the OpenPGP public key
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1472
ctypes.POINTER
1473
(ctypes.c_ubyte)),
1474
ctypes.c_uint(len(openpgp))))
1475
# New empty GnuTLS certificate
1476
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1479
# Import the OpenPGP public key into the certificate
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.GNUTLS_OPENPGP_FMT_RAW))
1484
# Verify the self signature in the key
1485
crtverify = ctypes.c_uint()
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
1489
if crtverify.value != 0:
1490
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
1492
("Verify failed"))
1493
# New buffer for the fingerprint
1494
buf = ctypes.create_string_buffer(20)
1495
buf_len = ctypes.c_size_t()
1496
# Get the fingerprint from the certificate into the buffer
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
1500
# Deinit the certificate
1501
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1502
# Convert the buffer to a Python bytestring
1503
fpr = ctypes.string_at(buf, buf_len.value)
1504
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1506
return hex_fpr
1507
1508
1509
class MultiprocessingMixIn(object):
1510
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1511
def sub_process_main(self, request, address):
1512
try:
1513
self.finish_request(request, address)
1514
except:
1515
self.handle_error(request, address)
1516
self.close_request(request)
1517
1518
def process_request(self, request, address):
1519
"""Start a new process to process the request."""
1520
proc = multiprocessing.Process(target = self.sub_process_main,
1521
args = (request,
1522
address))
1523
proc.start()
1524
return proc
1525
1526
1527
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1528
""" adds a pipe to the MixIn """
1529
def process_request(self, request, client_address):
1530
"""Overrides and wraps the original process_request().
1531
1532
This function creates a new pipe in self.pipe
1533
"""
1534
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1535
1536
proc = MultiprocessingMixIn.process_request(self, request,
1537
client_address)
1538
self.child_pipe.close()
1539
self.add_pipe(parent_pipe, proc)
1540
1541
def add_pipe(self, parent_pipe, proc):
1542
"""Dummy function; override as necessary"""
1543
raise NotImplementedError
1544
1545
1546
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1547
socketserver.TCPServer, object):
1548
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1549
719
1550
Attributes:
720
settings: Server settings
721
clients: Set() of Client objects
722
1551
enabled: Boolean; whether this server is activated yet
1552
interface: None or a network interface name (string)
1553
use_ipv6: Boolean; to use IPv6 or not
723
1554
"""
724
address_family = socket.AF_INET6
725
def __init__(self, *args, **kwargs):
726
if "settings" in kwargs:
727
self.settings = kwargs["settings"]
728
del kwargs["settings"]
729
if "clients" in kwargs:
730
self.clients = kwargs["clients"]
731
del kwargs["clients"]
732
self.enabled = False
733
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1555
def __init__(self, server_address, RequestHandlerClass,
1556
interface=None, use_ipv6=True):
1557
self.interface = interface
1558
if use_ipv6:
1559
self.address_family = socket.AF_INET6
1560
socketserver.TCPServer.__init__(self, server_address,
1561
RequestHandlerClass)
734
1562
def server_bind(self):
735
1563
"""This overrides the normal server_bind() function
736
1564
to bind to an interface if one was specified, and also NOT to
737
1565
bind to an address or port if they were not specified."""
738
if self.settings["interface"]:
739
# 25 is from /usr/include/asm-i486/socket.h
740
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
741
try:
742
self.socket.setsockopt(socket.SOL_SOCKET,
743
SO_BINDTODEVICE,
744
self.settings["interface"])
745
except socket.error, error:
746
if error[0] == errno.EPERM:
747
logger.error(u"No permission to"
748
u" bind to interface %s",
749
self.settings["interface"])
750
else:
751
raise error
1566
if self.interface is not None:
1567
if SO_BINDTODEVICE is None:
1568
logger.error("SO_BINDTODEVICE does not exist;"
1569
" cannot bind to interface %s",
1570
self.interface)
1571
else:
1572
try:
1573
self.socket.setsockopt(socket.SOL_SOCKET,
1574
SO_BINDTODEVICE,
1575
str(self.interface
1576
+ '\0'))
1577
except socket.error as error:
1578
if error[0] == errno.EPERM:
1579
logger.error("No permission to"
1580
" bind to interface %s",
1581
self.interface)
1582
elif error[0] == errno.ENOPROTOOPT:
1583
logger.error("SO_BINDTODEVICE not available;"
1584
" cannot bind to interface %s",
1585
self.interface)
1586
else:
1587
raise
752
1588
# Only bind(2) the socket if we really need to.
753
1589
if self.server_address[0] or self.server_address[1]:
754
1590
if not self.server_address[0]:
755
in6addr_any = "::"
756
self.server_address = (in6addr_any,
1591
if self.address_family == socket.AF_INET6:
1592
any_address = "::" # in6addr_any
1593
else:
1594
any_address = socket.INADDR_ANY
1595
self.server_address = (any_address,
757
1596
self.server_address[1])
758
1597
elif not self.server_address[1]:
759
1598
self.server_address = (self.server_address[0],
760
1599
0)
761
# if self.settings["interface"]:
1600
# if self.interface:
762
1601
# self.server_address = (self.server_address[0],
763
1602
# 0, # port
764
1603
# 0, # flowinfo
765
1604
# if_nametoindex
766
# (self.settings
767
# ["interface"]))
768
return super(IPv6_TCPServer, self).server_bind()
1605
# (self.interface))
1606
return socketserver.TCPServer.server_bind(self)
1607
1608
1609
class MandosServer(IPv6_TCPServer):
1610
"""Mandos server.
1611
1612
Attributes:
1613
clients: set of Client objects
1614
gnutls_priority GnuTLS priority string
1615
use_dbus: Boolean; to emit D-Bus signals or not
1616
1617
Assumes a gobject.MainLoop event loop.
1618
"""
1619
def __init__(self, server_address, RequestHandlerClass,
1620
interface=None, use_ipv6=True, clients=None,
1621
gnutls_priority=None, use_dbus=True):
1622
self.enabled = False
1623
self.clients = clients
1624
if self.clients is None:
1625
self.clients = set()
1626
self.use_dbus = use_dbus
1627
self.gnutls_priority = gnutls_priority
1628
IPv6_TCPServer.__init__(self, server_address,
1629
RequestHandlerClass,
1630
interface = interface,
1631
use_ipv6 = use_ipv6)
769
1632
def server_activate(self):
770
1633
if self.enabled:
771
return super(IPv6_TCPServer, self).server_activate()
1634
return socketserver.TCPServer.server_activate(self)
1635
772
1636
def enable(self):
773
1637
self.enabled = True
1638
1639
def add_pipe(self, parent_pipe, proc):
1640
# Call "handle_ipc" for both data and EOF events
1641
gobject.io_add_watch(parent_pipe.fileno(),
1642
gobject.IO_IN | gobject.IO_HUP,
1643
functools.partial(self.handle_ipc,
1644
parent_pipe =
1645
parent_pipe,
1646
proc = proc))
1647
1648
def handle_ipc(self, source, condition, parent_pipe=None,
1649
proc = None, client_object=None):
1650
condition_names = {
1651
gobject.IO_IN: "IN", # There is data to read.
1652
gobject.IO_OUT: "OUT", # Data can be written (without
1653
# blocking).
1654
gobject.IO_PRI: "PRI", # There is urgent data to read.
1655
gobject.IO_ERR: "ERR", # Error condition.
1656
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1657
# broken, usually for pipes and
1658
# sockets).
1659
}
1660
conditions_string = ' | '.join(name
1661
for cond, name in
1662
condition_names.iteritems()
1663
if cond & condition)
1664
# error, or the other end of multiprocessing.Pipe has closed
1665
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1666
# Wait for other process to exit
1667
proc.join()
1668
return False
1669
1670
# Read a request from the child
1671
request = parent_pipe.recv()
1672
command = request[0]
1673
1674
if command == 'init':
1675
fpr = request[1]
1676
address = request[2]
1677
1678
for c in self.clients:
1679
if c.fingerprint == fpr:
1680
client = c
1681
break
1682
else:
1683
logger.info("Client not found for fingerprint: %s, ad"
1684
"dress: %s", fpr, address)
1685
if self.use_dbus:
1686
# Emit D-Bus signal
1687
mandos_dbus_service.ClientNotFound(fpr,
1688
address[0])
1689
parent_pipe.send(False)
1690
return False
1691
1692
gobject.io_add_watch(parent_pipe.fileno(),
1693
gobject.IO_IN | gobject.IO_HUP,
1694
functools.partial(self.handle_ipc,
1695
parent_pipe =
1696
parent_pipe,
1697
proc = proc,
1698
client_object =
1699
client))
1700
parent_pipe.send(True)
1701
# remove the old hook in favor of the new above hook on
1702
# same fileno
1703
return False
1704
if command == 'funcall':
1705
funcname = request[1]
1706
args = request[2]
1707
kwargs = request[3]
1708
1709
parent_pipe.send(('data', getattr(client_object,
1710
funcname)(*args,
1711
**kwargs)))
1712
1713
if command == 'getattr':
1714
attrname = request[1]
1715
if callable(client_object.__getattribute__(attrname)):
1716
parent_pipe.send(('function',))
1717
else:
1718
parent_pipe.send(('data', client_object
1719
.__getattribute__(attrname)))
1720
1721
if command == 'setattr':
1722
attrname = request[1]
1723
value = request[2]
1724
setattr(client_object, attrname, value)
1725
1726
return True
774
1727
775
1728
776
1729
def string_to_delta(interval):
777
1730
"""Parse a string and return a datetime.timedelta
778
1731
779
1732
>>> string_to_delta('7d')
780
1733
datetime.timedelta(7)
781
1734
>>> string_to_delta('60s')
784
1737
datetime.timedelta(0, 3600)
785
1738
>>> string_to_delta('24h')
786
1739
datetime.timedelta(1)
787
>>> string_to_delta(u'1w')
1740
>>> string_to_delta('1w')
788
1741
datetime.timedelta(7)
789
1742
>>> string_to_delta('5m 30s')
790
1743
datetime.timedelta(0, 330)
794
1747
try:
795
1748
suffix = unicode(s[-1])
796
1749
value = int(s[:-1])
797
if suffix == u"d":
1750
if suffix == "d":
798
1751
delta = datetime.timedelta(value)
799
elif suffix == u"s":
1752
elif suffix == "s":
800
1753
delta = datetime.timedelta(0, value)
801
elif suffix == u"m":
1754
elif suffix == "m":
802
1755
delta = datetime.timedelta(0, 0, 0, 0, value)
803
elif suffix == u"h":
1756
elif suffix == "h":
804
1757
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
805
elif suffix == u"w":
1758
elif suffix == "w":
806
1759
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
807
1760
else:
808
raise ValueError
809
except (ValueError, IndexError):
810
raise ValueError
1761
raise ValueError("Unknown suffix %r" % suffix)
1762
except (ValueError, IndexError) as e:
1763
raise ValueError(*(e.args))
811
1764
timevalue += delta
812
1765
return timevalue
813
1766
814
1767
815
def server_state_changed(state):
816
"""Derived from the Avahi example code"""
817
if state == avahi.SERVER_COLLISION:
818
logger.error(u"Zeroconf server name collision")
819
service.remove()
820
elif state == avahi.SERVER_RUNNING:
821
service.add()
822
823
824
def entry_group_state_changed(state, error):
825
"""Derived from the Avahi example code"""
826
logger.debug(u"Avahi state change: %i", state)
827
828
if state == avahi.ENTRY_GROUP_ESTABLISHED:
829
logger.debug(u"Zeroconf service established.")
830
elif state == avahi.ENTRY_GROUP_COLLISION:
831
logger.warning(u"Zeroconf service name collision.")
832
service.rename()
833
elif state == avahi.ENTRY_GROUP_FAILURE:
834
logger.critical(u"Avahi: Error in group state changed %s",
835
unicode(error))
836
raise AvahiGroupError("State changed: %s", str(error))
837
838
1768
def if_nametoindex(interface):
839
"""Call the C function if_nametoindex(), or equivalent"""
1769
"""Call the C function if_nametoindex(), or equivalent
1770
1771
Note: This function cannot accept a unicode string."""
840
1772
global if_nametoindex
841
1773
try:
842
1774
if_nametoindex = (ctypes.cdll.LoadLibrary
843
1775
(ctypes.util.find_library("c"))
844
1776
.if_nametoindex)
845
1777
except (OSError, AttributeError):
846
if "struct" not in sys.modules:
847
import struct
848
if "fcntl" not in sys.modules:
849
import fcntl
1778
logger.warning("Doing if_nametoindex the hard way")
850
1779
def if_nametoindex(interface):
851
1780
"Get an interface index the hard way, i.e. using fcntl()"
852
1781
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
853
with closing(socket.socket()) as s:
1782
with contextlib.closing(socket.socket()) as s:
854
1783
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
855
struct.pack("16s16x", interface))
856
interface_index = struct.unpack("I", ifreq[16:20])[0]
1784
struct.pack(str("16s16x"),
1785
interface))
1786
interface_index = struct.unpack(str("I"),
1787
ifreq[16:20])[0]
857
1788
return interface_index
858
1789
return if_nametoindex(interface)
859
1790
860
1791
861
1792
def daemon(nochdir = False, noclose = False):
862
1793
"""See daemon(3). Standard BSD Unix function.
1794
863
1795
This should really exist as os.daemon, but it doesn't (yet)."""
864
1796
if os.fork():
865
1797
sys.exit()
873
1805
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
874
1806
if not stat.S_ISCHR(os.fstat(null).st_mode):
875
1807
raise OSError(errno.ENODEV,
876
"/dev/null not a character device")
1808
"%s not a character device"
1809
% os.path.devnull)
877
1810
os.dup2(null, sys.stdin.fileno())
878
1811
os.dup2(null, sys.stdout.fileno())
879
1812
os.dup2(null, sys.stderr.fileno())
882
1815
883
1816
884
1817
def main():
885
parser = OptionParser(version = "%%prog %s" % version)
886
parser.add_option("-i", "--interface", type="string",
887
metavar="IF", help="Bind to interface IF")
888
parser.add_option("-a", "--address", type="string",
889
help="Address to listen for requests on")
890
parser.add_option("-p", "--port", type="int",
891
help="Port number to receive requests on")
892
parser.add_option("--check", action="store_true", default=False,
893
help="Run self-test")
894
parser.add_option("--debug", action="store_true",
895
help="Debug mode; run in foreground and log to"
896
" terminal")
897
parser.add_option("--priority", type="string", help="GnuTLS"
898
" priority string (see GnuTLS documentation)")
899
parser.add_option("--servicename", type="string", metavar="NAME",
900
help="Zeroconf service name")
901
parser.add_option("--configdir", type="string",
902
default="/etc/mandos", metavar="DIR",
903
help="Directory to search for configuration"
904
" files")
905
options = parser.parse_args()[0]
1818
1819
##################################################################
1820
# Parsing of options, both command line and config file
1821
1822
parser = argparse.ArgumentParser()
1823
parser.add_argument("-v", "--version", action="version",
1824
version = "%%(prog)s %s" % version,
1825
help="show version number and exit")
1826
parser.add_argument("-i", "--interface", metavar="IF",
1827
help="Bind to interface IF")
1828
parser.add_argument("-a", "--address",
1829
help="Address to listen for requests on")
1830
parser.add_argument("-p", "--port", type=int,
1831
help="Port number to receive requests on")
1832
parser.add_argument("--check", action="store_true",
1833
help="Run self-test")
1834
parser.add_argument("--debug", action="store_true",
1835
help="Debug mode; run in foreground and log"
1836
" to terminal")
1837
parser.add_argument("--debuglevel", metavar="LEVEL",
1838
help="Debug level for stdout output")
1839
parser.add_argument("--priority", help="GnuTLS"
1840
" priority string (see GnuTLS documentation)")
1841
parser.add_argument("--servicename",
1842
metavar="NAME", help="Zeroconf service name")
1843
parser.add_argument("--configdir",
1844
default="/etc/mandos", metavar="DIR",
1845
help="Directory to search for configuration"
1846
" files")
1847
parser.add_argument("--no-dbus", action="store_false",
1848
dest="use_dbus", help="Do not provide D-Bus"
1849
" system bus interface")
1850
parser.add_argument("--no-ipv6", action="store_false",
1851
dest="use_ipv6", help="Do not use IPv6")
1852
options = parser.parse_args()
906
1853
907
1854
if options.check:
908
1855
import doctest
917
1864
"priority":
918
1865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
919
1866
"servicename": "Mandos",
1867
"use_dbus": "True",
1868
"use_ipv6": "True",
1869
"debuglevel": "",
920
1870
}
921
1871
922
1872
# Parse config file for server-global settings
923
server_config = ConfigParser.SafeConfigParser(server_defaults)
1873
server_config = configparser.SafeConfigParser(server_defaults)
924
1874
del server_defaults
925
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1875
server_config.read(os.path.join(options.configdir,
1876
"mandos.conf"))
926
1877
# Convert the SafeConfigParser object to a dict
927
1878
server_settings = server_config.defaults()
928
# Use getboolean on the boolean config option
929
server_settings["debug"] = (server_config.getboolean
930
("DEFAULT", "debug"))
1879
# Use the appropriate methods on the non-string config options
1880
for option in ("debug", "use_dbus", "use_ipv6"):
1881
server_settings[option] = server_config.getboolean("DEFAULT",
1882
option)
1883
if server_settings["port"]:
1884
server_settings["port"] = server_config.getint("DEFAULT",
1885
"port")
931
1886
del server_config
932
1887
933
1888
# Override the settings from the config file with command line
934
1889
# options, if set.
935
1890
for option in ("interface", "address", "port", "debug",
936
"priority", "servicename", "configdir"):
1891
"priority", "servicename", "configdir",
1892
"use_dbus", "use_ipv6", "debuglevel"):
937
1893
value = getattr(options, option)
938
1894
if value is not None:
939
1895
server_settings[option] = value
940
1896
del options
1897
# Force all strings to be unicode
1898
for option in server_settings.keys():
1899
if type(server_settings[option]) is str:
1900
server_settings[option] = unicode(server_settings[option])
941
1901
# Now we have our good server settings in "server_settings"
942
1902
1903
##################################################################
1904
1905
# For convenience
943
1906
debug = server_settings["debug"]
944
945
if not debug:
946
syslogger.setLevel(logging.WARNING)
947
console.setLevel(logging.WARNING)
1907
debuglevel = server_settings["debuglevel"]
1908
use_dbus = server_settings["use_dbus"]
1909
use_ipv6 = server_settings["use_ipv6"]
948
1910
949
1911
if server_settings["servicename"] != "Mandos":
950
1912
syslogger.setFormatter(logging.Formatter
951
('Mandos (%s): %%(levelname)s:'
952
' %%(message)s'
1913
('Mandos (%s) [%%(process)d]:'
1914
' %%(levelname)s: %%(message)s'
953
1915
% server_settings["servicename"]))
954
1916
955
1917
# Parse config file with clients
956
client_defaults = { "timeout": "1h",
957
"interval": "5m",
958
"checker": "fping -q -- %(host)s",
1918
client_defaults = { "timeout": "5m",
1919
"extended_timeout": "15m",
1920
"interval": "2m",
1921
"checker": "fping -q -- %%(host)s",
959
1922
"host": "",
1923
"approval_delay": "0s",
1924
"approval_duration": "1s",
960
1925
}
961
client_config = ConfigParser.SafeConfigParser(client_defaults)
1926
client_config = configparser.SafeConfigParser(client_defaults)
962
1927
client_config.read(os.path.join(server_settings["configdir"],
963
1928
"clients.conf"))
964
1929
965
clients = Set()
966
tcp_server = IPv6_TCPServer((server_settings["address"],
967
server_settings["port"]),
968
TCP_handler,
969
settings=server_settings,
970
clients=clients)
971
pidfilename = "/var/run/mandos.pid"
972
try:
973
pidfile = open(pidfilename, "w")
974
except IOError, error:
975
logger.error("Could not open file %r", pidfilename)
1930
global mandos_dbus_service
1931
mandos_dbus_service = None
1932
1933
tcp_server = MandosServer((server_settings["address"],
1934
server_settings["port"]),
1935
ClientHandler,
1936
interface=(server_settings["interface"]
1937
or None),
1938
use_ipv6=use_ipv6,
1939
gnutls_priority=
1940
server_settings["priority"],
1941
use_dbus=use_dbus)
1942
if not debug:
1943
pidfilename = "/var/run/mandos.pid"
1944
try:
1945
pidfile = open(pidfilename, "w")
1946
except IOError:
1947
logger.error("Could not open file %r", pidfilename)
976
1948
977
1949
try:
978
1950
uid = pwd.getpwnam("_mandos").pw_uid
1951
gid = pwd.getpwnam("_mandos").pw_gid
979
1952
except KeyError:
980
1953
try:
981
1954
uid = pwd.getpwnam("mandos").pw_uid
1955
gid = pwd.getpwnam("mandos").pw_gid
982
1956
except KeyError:
983
1957
try:
984
1958
uid = pwd.getpwnam("nobody").pw_uid
1959
gid = pwd.getpwnam("nobody").pw_gid
985
1960
except KeyError:
986
1961
uid = 65534
987
try:
988
gid = pwd.getpwnam("_mandos").pw_gid
989
except KeyError:
990
try:
991
gid = pwd.getpwnam("mandos").pw_gid
992
except KeyError:
993
try:
994
gid = pwd.getpwnam("nogroup").pw_gid
995
except KeyError:
996
1962
gid = 65534
997
1963
try:
1964
os.setgid(gid)
998
1965
os.setuid(uid)
999
os.setgid(gid)
1000
except OSError, error:
1966
except OSError as error:
1001
1967
if error[0] != errno.EPERM:
1002
1968
raise error
1003
1969
1004
global service
1005
service = AvahiService(name = server_settings["servicename"],
1006
servicetype = "_mandos._tcp", )
1007
if server_settings["interface"]:
1008
service.interface = (if_nametoindex
1009
(server_settings["interface"]))
1010
1011
global main_loop
1012
global bus
1013
global server
1014
# From the Avahi example code
1015
DBusGMainLoop(set_as_default=True )
1016
main_loop = gobject.MainLoop()
1017
bus = dbus.SystemBus()
1018
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1019
avahi.DBUS_PATH_SERVER),
1020
avahi.DBUS_INTERFACE_SERVER)
1021
# End of Avahi example code
1022
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1023
1024
clients.update(Set(Client(name = section,
1025
config
1026
= dict(client_config.items(section)))
1027
for section in client_config.sections()))
1028
if not clients:
1029
logger.critical(u"No clients defined")
1030
sys.exit(1)
1970
if not debug and not debuglevel:
1971
syslogger.setLevel(logging.WARNING)
1972
console.setLevel(logging.WARNING)
1973
if debuglevel:
1974
level = getattr(logging, debuglevel.upper())
1975
syslogger.setLevel(level)
1976
console.setLevel(level)
1031
1977
1032
1978
if debug:
1979
# Enable all possible GnuTLS debugging
1980
1981
# "Use a log level over 10 to enable all debugging options."
1982
# - GnuTLS manual
1983
gnutls.library.functions.gnutls_global_set_log_level(11)
1984
1985
@gnutls.library.types.gnutls_log_func
1986
def debug_gnutls(level, string):
1987
logger.debug("GnuTLS: %s", string[:-1])
1988
1989
(gnutls.library.functions
1990
.gnutls_global_set_log_function(debug_gnutls))
1991
1033
1992
# Redirect stdin so all checkers get /dev/null
1034
1993
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1035
1994
os.dup2(null, sys.stdin.fileno())
1038
1997
else:
1039
1998
# No console logging
1040
1999
logger.removeHandler(console)
2000
2001
# Need to fork before connecting to D-Bus
2002
if not debug:
1041
2003
# Close all input and output, do double fork, etc.
1042
2004
daemon()
1043
2005
1044
try:
1045
pid = os.getpid()
1046
pidfile.write(str(pid) + "\n")
1047
pidfile.close()
1048
del pidfile
1049
except IOError:
1050
logger.error(u"Could not write to file %r with PID %d",
1051
pidfilename, pid)
1052
except NameError:
1053
# "pidfile" was never created
1054
pass
1055
del pidfilename
2006
global main_loop
2007
# From the Avahi example code
2008
DBusGMainLoop(set_as_default=True )
2009
main_loop = gobject.MainLoop()
2010
bus = dbus.SystemBus()
2011
# End of Avahi example code
2012
if use_dbus:
2013
try:
2014
bus_name = dbus.service.BusName("se.recompile.Mandos",
2015
bus, do_not_queue=True)
2016
old_bus_name = (dbus.service.BusName
2017
("se.bsnet.fukt.Mandos", bus,
2018
do_not_queue=True))
2019
except dbus.exceptions.NameExistsException as e:
2020
logger.error(unicode(e) + ", disabling D-Bus")
2021
use_dbus = False
2022
server_settings["use_dbus"] = False
2023
tcp_server.use_dbus = False
2024
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2025
service = AvahiService(name = server_settings["servicename"],
2026
servicetype = "_mandos._tcp",
2027
protocol = protocol, bus = bus)
2028
if server_settings["interface"]:
2029
service.interface = (if_nametoindex
2030
(str(server_settings["interface"])))
2031
2032
global multiprocessing_manager
2033
multiprocessing_manager = multiprocessing.Manager()
2034
2035
client_class = Client
2036
if use_dbus:
2037
client_class = functools.partial(ClientDBusTransitional,
2038
bus = bus)
2039
def client_config_items(config, section):
2040
special_settings = {
2041
"approved_by_default":
2042
lambda: config.getboolean(section,
2043
"approved_by_default"),
2044
}
2045
for name, value in config.items(section):
2046
try:
2047
yield (name, special_settings[name]())
2048
except KeyError:
2049
yield (name, value)
2050
2051
tcp_server.clients.update(set(
2052
client_class(name = section,
2053
config= dict(client_config_items(
2054
client_config, section)))
2055
for section in client_config.sections()))
2056
if not tcp_server.clients:
2057
logger.warning("No clients defined")
2058
2059
if not debug:
2060
try:
2061
with pidfile:
2062
pid = os.getpid()
2063
pidfile.write(str(pid) + "\n".encode("utf-8"))
2064
del pidfile
2065
except IOError:
2066
logger.error("Could not write to file %r with PID %d",
2067
pidfilename, pid)
2068
except NameError:
2069
# "pidfile" was never created
2070
pass
2071
del pidfilename
2072
2073
signal.signal(signal.SIGINT, signal.SIG_IGN)
2074
2075
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2076
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2077
2078
if use_dbus:
2079
class MandosDBusService(dbus.service.Object):
2080
"""A D-Bus proxy object"""
2081
def __init__(self):
2082
dbus.service.Object.__init__(self, bus, "/")
2083
_interface = "se.recompile.Mandos"
2084
2085
@dbus.service.signal(_interface, signature="o")
2086
def ClientAdded(self, objpath):
2087
"D-Bus signal"
2088
pass
2089
2090
@dbus.service.signal(_interface, signature="ss")
2091
def ClientNotFound(self, fingerprint, address):
2092
"D-Bus signal"
2093
pass
2094
2095
@dbus.service.signal(_interface, signature="os")
2096
def ClientRemoved(self, objpath, name):
2097
"D-Bus signal"
2098
pass
2099
2100
@dbus.service.method(_interface, out_signature="ao")
2101
def GetAllClients(self):
2102
"D-Bus method"
2103
return dbus.Array(c.dbus_object_path
2104
for c in tcp_server.clients)
2105
2106
@dbus.service.method(_interface,
2107
out_signature="a{oa{sv}}")
2108
def GetAllClientsWithProperties(self):
2109
"D-Bus method"
2110
return dbus.Dictionary(
2111
((c.dbus_object_path, c.GetAll(""))
2112
for c in tcp_server.clients),
2113
signature="oa{sv}")
2114
2115
@dbus.service.method(_interface, in_signature="o")
2116
def RemoveClient(self, object_path):
2117
"D-Bus method"
2118
for c in tcp_server.clients:
2119
if c.dbus_object_path == object_path:
2120
tcp_server.clients.remove(c)
2121
c.remove_from_connection()
2122
# Don't signal anything except ClientRemoved
2123
c.disable(quiet=True)
2124
# Emit D-Bus signal
2125
self.ClientRemoved(object_path, c.name)
2126
return
2127
raise KeyError(object_path)
2128
2129
del _interface
2130
2131
class MandosDBusServiceTransitional(MandosDBusService):
2132
__metaclass__ = AlternateDBusNamesMetaclass
2133
mandos_dbus_service = MandosDBusServiceTransitional()
1056
2134
1057
2135
def cleanup():
1058
2136
"Cleanup function; run on exit"
1059
global group
1060
# From the Avahi example code
1061
if not group is None:
1062
group.Free()
1063
group = None
1064
# End of Avahi example code
2137
service.cleanup()
1065
2138
1066
while clients:
1067
client = clients.pop()
2139
multiprocessing.active_children()
2140
while tcp_server.clients:
2141
client = tcp_server.clients.pop()
2142
if use_dbus:
2143
client.remove_from_connection()
1068
2144
client.disable_hook = None
1069
client.disable()
2145
# Don't signal anything except ClientRemoved
2146
client.disable(quiet=True)
2147
if use_dbus:
2148
# Emit D-Bus signal
2149
mandos_dbus_service.ClientRemoved(client
2150
.dbus_object_path,
2151
client.name)
1070
2152
1071
2153
atexit.register(cleanup)
1072
2154
1073
if not debug:
1074
signal.signal(signal.SIGINT, signal.SIG_IGN)
1075
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1076
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1077
1078
class MandosServer(dbus.service.Object):
1079
"""A D-Bus proxy object"""
1080
def __init__(self):
1081
dbus.service.Object.__init__(self, bus,
1082
"/Mandos")
1083
_interface = u"org.mandos_system.Mandos"
1084
1085
@dbus.service.signal(_interface, signature="oa{sv}")
1086
def ClientAdded(self, objpath, properties):
1087
"D-Bus signal"
1088
pass
1089
1090
@dbus.service.signal(_interface, signature="o")
1091
def ClientRemoved(self, objpath):
1092
"D-Bus signal"
1093
pass
1094
1095
@dbus.service.method(_interface, out_signature="ao")
1096
def GetAllClients(self):
1097
return dbus.Array(c.dbus_object_path for c in clients)
1098
1099
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1100
def GetAllClientsWithProperties(self):
1101
return dbus.Dictionary(
1102
((c.dbus_object_path, c.GetAllProperties())
1103
for c in clients),
1104
signature="oa{sv}")
1105
1106
@dbus.service.method(_interface, in_signature="o")
1107
def RemoveClient(self, object_path):
1108
for c in clients:
1109
if c.dbus_object_path == object_path:
1110
c.disable()
1111
clients.remove(c)
1112
return
1113
raise KeyError
1114
1115
del _interface
1116
1117
mandos_server = MandosServer()
1118
1119
for client in clients:
1120
# Emit D-Bus signal
1121
mandos_server.ClientAdded(client.dbus_object_path,
1122
client.GetAllProperties())
2155
for client in tcp_server.clients:
2156
if use_dbus:
2157
# Emit D-Bus signal
2158
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1123
2159
client.enable()
1124
2160
1125
2161
tcp_server.enable()
1127
2163
1128
2164
# Find out what port we got
1129
2165
service.port = tcp_server.socket.getsockname()[1]
1130
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1131
u" scope_id %d" % tcp_server.socket.getsockname())
2166
if use_ipv6:
2167
logger.info("Now listening on address %r, port %d,"
2168
" flowinfo %d, scope_id %d"
2169
% tcp_server.socket.getsockname())
2170
else: # IPv4
2171
logger.info("Now listening on address %r, port %d"
2172
% tcp_server.socket.getsockname())
1132
2173
1133
2174
#service.interface = tcp_server.socket.getsockname()[3]
1134
2175
1135
2176
try:
1136
2177
# From the Avahi example code
1137
server.connect_to_signal("StateChanged", server_state_changed)
1138
2178
try:
1139
server_state_changed(server.GetState())
1140
except dbus.exceptions.DBusException, error:
1141
logger.critical(u"DBusException: %s", error)
2179
service.activate()
2180
except dbus.exceptions.DBusException as error:
2181
logger.critical("DBusException: %s", error)
2182
cleanup()
1142
2183
sys.exit(1)
1143
2184
# End of Avahi example code
1144
2185
1147
2188
(tcp_server.handle_request
1148
2189
(*args[2:], **kwargs) or True))
1149
2190
1150
logger.debug(u"Starting main loop")
2191
logger.debug("Starting main loop")
1151
2192
main_loop.run()
1152
except AvahiError, error:
1153
logger.critical(u"AvahiError: %s" + unicode(error))
2193
except AvahiError as error:
2194
logger.critical("AvahiError: %s", error)
2195
cleanup()
1154
2196
sys.exit(1)
1155
2197
except KeyboardInterrupt:
1156
2198
if debug:
1157
print
2199
print("", file=sys.stderr)
2200
logger.debug("Server received KeyboardInterrupt")
2201
logger.debug("Server exiting")
2202
# Must run before the D-Bus bus name gets deregistered
2203
cleanup()
2204
1158
2205
1159
2206
if __name__ == '__main__':
1160
2207
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0